201026155223155 has 32 divisors (see below), whose sum is σ = 247232512111104. Its totient is φ = 156867539659776.

The previous prime is 201026155223141. The next prime is 201026155223263. The reversal of 201026155223155 is 551322551620102.

It is a cyclic number.

It is not a de Polignac number, because 201026155223155 - 2⁵ = 201026155223123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367446444 + ... + 367993126.

It is an arithmetic number, because the mean of its divisors is an integer number (7726016003472).

Almost surely, 2^{201026155223155} is an apocalyptic number.

201026155223155 is a deficient number, since it is larger than the sum of its proper divisors (46206356887949).

201026155223155 is a wasteful number, since it uses less digits than its factorization.

201026155223155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557515.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 201026155223155 in words is "two hundred one trillion, twenty-six billion, one hundred fifty-five million, two hundred twenty-three thousand, one hundred fifty-five".